›› 2017, Vol. 31 ›› Issue (4): 495-499.

• 工程实录 • 上一篇    下一篇

挡土墙地震主动土压力的解析解

王紫旭,孙 勇,尚本峰,冯 辉,赵 敏   

  1. (贵州大学 国土资源部喀斯特环境与地质灾害防治重点实验室,贵阳 550003)
  • 收稿日期:2017-06-23 修回日期:2017-07-06 出版日期:2017-08-20 发布日期:2017-08-22
  • 通讯作者: 孙 勇(1963-),男,博士,教授,研究方向为岩土工程和建筑结构。
  • 作者简介:王紫旭(1991-),男,在读硕士,研究方向为基础工程。
  • 基金资助:

    国家自然科学基金资助项目(51168009);贵州省科学技术基金资助项目黔科合J字([2010]2245)

Seismic Active Earth Pressures on the Retaining Walls

WANG Zixu, SUN Yong, SHANG Benfeng, FENG Hui, ZHAO Min   

  1. (Karst Key Laboratory of Environmental and Geological Disaster Prevention and Control, Guizhou University, Guiyang 550003)
  • Received:2017-06-23 Revised:2017-07-06 Online:2017-08-20 Published:2017-08-22

摘要: 地震主动土压力公式用微分薄层法来推出,填土料为黏土,挡土墙竖直,填土面水平,填土和墙背有粘聚力 c 和内摩擦角 φ 作用,墙后破坏体存在竖直和水平两个方向的加速度,目前所见的地震和非地震的主动土压力都是这个公式的特例。对以上条件下的挡土墙用过墙踵的破坏体作静力平衡分析(如朗肯分析),获得的总土压力与文中微分薄层法获得的总土压力一样,但微分法作用点位置显著增高。因此在设计抗震和非抗震挡土墙时要特别注意。

关键词: 微分薄层法, 主动土压力, 地震条件下的隐含处理

Abstract: An active seismic pressures acting on a retaining wall is derived with differential thin layer method. The retaining wall has vertical face and horizontal level, the backfill material is cohesive and the interface between the back of the wall and the backfill material follows cφ  soil relations. The vertical and horizontal seismic accelerations are acting on the failure plane. It is concluded that the conventional seismic and static active earth pressure formulas are this generic formula under special conditions. The force equilibrium method applying at the toe of the retaining wall (Rankine Earth Pressure), has the same total earth pressures as the value derived from the differential thin layer method. However, the point of acting obtained from the differential thin layer method is higher than the conventional method.

Key words: Differential Layer, Active Earth Pressure, Implicit Treatment under Seismic Conditions